docs: NumPy and Asyncio tutorial super-sections, tutorial landing restructure

- Rewrite NumPy tutorial super-section: 18 pages across 9 captioned
  subsections, building ndarray from first principles through
  constructors, dtypes, indexing/slicing, shape and strides,
  views/copies, element-wise math, broadcasting, reductions,
  selection, linear algebra, FFT and filtering, scipy extras
  (interp/polyfit/integrate/optimize/special/random), the
  image.Image bridge, and performance habits.
- Add Asyncio tutorial super-section: cooperative concurrency,
  coroutines/tasks, event loop, gather, timeouts and cancellation,
  exceptions, events/locks/threadsafe-flag primitives, awaitable
  classes, async iterators, async context managers, loop control,
  snapshot-loop capstone, pitfalls.
- Restructure tutorial landing: new intro paragraph and reorganized
  toctree exposing every super-section in order (Python Overview,
  Hardware Control, Vision Sensors, Image, NumPy, ML, Asyncio,
  Networking, Web servers, Production).
- Add Production super-section index and move battery_life,
  firmware_development, freezing-scripts (was production.rst),
  tls_certificates under production/.
- Add placeholder index pages for image/, ml/, networking/,
  webservers/.
- Forward-link python/iteration/coroutines.rst to the Asyncio
  section now that it exists.
- Misc audit touchups across quickref/* and shields/*.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: kwagyeman

docs/openmvcam/quickref/arduino-giga-r1-wifi.rst

@@ -202,7 +202,7 @@ The Giga R1 can be powered through any of these paths:
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the Giga R1 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/arduino-nicla-vision.rst

@@ -169,7 +169,7 @@ same pins — one I²C 1 bus exposed on two connectors.
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the Nicla Vision will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/arduino-portenta-h7.rst

@@ -155,7 +155,7 @@ are the same pins — one I²C 3 bus exposed on two connectors.
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the Portenta H7 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-ae3.rst

@@ -124,7 +124,7 @@ regulator.
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the AE3 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-cam-h7-plus.rst

@@ -119,7 +119,7 @@ USB instead.
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the H7 Plus will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-cam-h7.rst

@@ -118,7 +118,7 @@ instead.
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the H7 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-cam-m4.rst

@@ -107,7 +107,7 @@ Power pins
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the M4 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-cam-m7.rst

@@ -106,7 +106,7 @@ Power pins
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the M7 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-n6.rst

@@ -150,7 +150,7 @@ Power pins
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the N6 will run on a battery for a given
    active / deep-sleep duty cycle.
 

docs/openmvcam/quickref/openmv-rt1062.rst

@@ -146,7 +146,7 @@ Power pins
 
 .. tip::
 
-   Use the :doc:`battery life estimator <../tutorial/battery_life>` to
+   Use the :doc:`battery life estimator <../tutorial/production/battery-life>` to
    model how long the RT1062 will run on a battery for a given
    active / deep-sleep duty cycle.