fix: improve body parsing logic (#72)

Current body parsing logic with trim() + split("###") is too fragile and
pose problems with some body that contains case with ### in the middle
of the line or case with codeblock ``` section.

These case will cause the script to parse these as separate section and
produce wrong outputs and in some case even prints error assuming things
are checkbox and errors out on the concat function.

To make the parsing logic more solid, implement a dedicated function and
parse with this logic:
- We split the body for "\n"
- We ignore codeblock ``` section
- We check "###" only at the start of the line
- We check for "### " (with the space included) as that is the correct
  section Github issue template expects.

With the following change case like:
```
root@OpenWrt:~# cat /boot/config.txt
```

Are correctly parsed as all part of a single section instead of being
wrongly treated as different empty sections.

---------

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>

Author: Ansuel

fixtures/paragraph-confusing-####/expected.json

@@ -0,0 +1,3 @@
+{
+  "textarea-one": "Textarea input text 1 ####"
+}

fixtures/paragraph-confusing-####/form.yml

@@ -0,0 +1,9 @@
+body:
+  - type: textarea
+    id: textarea-one
+    attributes:
+      label: My textarea input
+  - type: textarea
+    id: textarea-two
+    attributes:
+      label: Another textarea input

fixtures/paragraph-confusing-####/issue-body.md

@@ -0,0 +1,3 @@
+### My textarea input
+
+Textarea input text 1 ####

fixtures/paragraph-confusing-####/issue.js

@@ -0,0 +1,8 @@
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = fileURLToPath(new URL(".", import.meta.url));
+const issueBodyPath = resolve(__dirname, "issue-body.md");
+
+export default readFileSync(issueBodyPath, "utf-8");

fixtures/paragraph-ignore-```/expected.json

@@ -0,0 +1,3 @@
+{
+  "textarea-one": "Textarea input text 1\n\n```\n### To be ignored tag\n```"
+}

fixtures/paragraph-ignore-```/form.yml

@@ -0,0 +1,9 @@
+body:
+  - type: textarea
+    id: textarea-one
+    attributes:
+      label: My textarea input
+  - type: textarea
+    id: textarea-two
+    attributes:
+      label: Another textarea input

fixtures/paragraph-ignore-```/issue-body.md

@@ -0,0 +1,7 @@
+### My textarea input
+
+Textarea input text 1
+
+```
+### To be ignored tag
+```

fixtures/paragraph-ignore-```/issue.js

@@ -0,0 +1,8 @@
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const __dirname = fileURLToPath(new URL(".", import.meta.url));
+const issueBodyPath = resolve(__dirname, "issue-body.md");
+
+export default readFileSync(issueBodyPath, "utf-8");

fixtures/paragraph-ignore-```sh/expected.json

@@ -0,0 +1,3 @@
+{
+  "textarea-one": "Textarea input text 1\n\n```sh\n### To be ignored tag\n```"
+}

fixtures/paragraph-ignore-```sh/form.yml

@@ -0,0 +1,9 @@
+body:
+  - type: textarea
+    id: textarea-one
+    attributes:
+      label: My textarea input
+  - type: textarea
+    id: textarea-two
+    attributes:
+      label: Another textarea input