Update licensing to MPL-2.0 + Palimpsest

- LICENSE: MPL-2.0 with Palimpsest notice
- Added PALIMPSEST.adoc philosophy document
- Updated README badges
- Updated workflow SPDX headers to MPL-2.0

Legal license: MPL-2.0
Philosophical framework: Palimpsest (not yet legally binding)
Future: Palimpsest v0.5+ will integrate MPL-2.0

🤖 Generated with Claude Code

Author: Jonathan D.A. Jewell

PALIMPSEST.adoc

@@ -3,7 +3,7 @@
 :toc-placement!:
 
 image:https://img.shields.io/badge/license-MPL--2.0-blue.svg[MPL-2.0,link="https://www.mozilla.org/en-US/MPL/2.0/"]
-image:https://img.shields.io/badge/philosophy-Palimpsest-purple.svg[Palimpsest,link="https://github.com/hyperpolymath/palimpsest-license"]
+image:https://img.shields.io/badge/philosophy-Palimpsest-purple.svg[Palimpsest,link="https://github.com/hyperpolymath/palimpsest-licence"]
 
 toc::[]
 
@@ -57,7 +57,7 @@ If you are interested in:
 **Please get in touch:**
 
 * GitHub: https://github.com/hyperpolymath
-* Palimpsest Licence repo: https://github.com/hyperpolymath/palimpsest-license
+* Palimpsest Licence repo: https://github.com/hyperpolymath/palimpsest-licence
 
 == Signing Up to Palimpsest
 

README.adoc

@@ -1,7 +1,7 @@
 = php-aegis
 
 image:https://img.shields.io/badge/License-MPL_2.0-blue.svg[MPL-2.0,link="https://opensource.org/licenses/MPL-2.0"]
-image:https://img.shields.io/badge/Philosophy-Palimpsest-purple.svg[Palimpsest,link="https://github.com/hyperpolymath/palimpsest-license"]
+image:https://img.shields.io/badge/Philosophy-Palimpsest-purple.svg[Palimpsest,link="https://github.com/hyperpolymath/palimpsest-licence"]
 
 
 :toc: