docs: update dev docs, fix broken links, improve clarity of key points (#2354)

* Dev docs: tests, postgres/psycog2

* Update pull request process.

* Add Food/Unit parsing instructions to the FAQ

* Update docker composes: mealie-data now local to docker-compose rather than hidden in docker volume dir! postgres points to 1.0.0b5

* sqlite docker-compose: mealie-data now local rather than hidden in docker volumes

* Merge Intro FAQ into main FAQ

* Progress on docs

* Add Advanced and v1b5 to docs index

* v1b5 changelog consistency with other changelogs

* Features: fix wrong link, name buttons for clarity

* Migration: link to github releases

* Updating: link to migration page, format docker cmds

* FAQ: update smart ingredient formatting

* Intro: fix typos

* API: update for newbie clarity

* Roadmap: update feature request & progress mechanism

* iOS shortcut: fix broken image links

* installation: add SMTP google app passwords

* Postgres: add header note on why.

* Update Groups doc per Discord discussion

* mealie-data back into docker default volume path

docs/mkdocs.yml

@@ -65,6 +65,7 @@ nav:
       - FAQ: "documentation/getting-started/faq.md"
       - API: "documentation/getting-started/api-usage.md"
       - Road Map: "documentation/getting-started/roadmap.md"
+      - Advanced: "documentation/getting-started/installation/advanced.md"
 
       - Installation:
           - Installation Checklist: "documentation/getting-started/installation/installation-checklist.md"
@@ -95,6 +96,7 @@ nav:
           - Improving Ingredient Parser: "contributors/guides/ingredient-parser.md"
 
   - Change Log:
+      - v1.0.0beta-5: "changelog/v1.0.0beta-5.md"
       - v1.0.0beta-4: "changelog/v1.0.0beta-4.md"
       - v1.0.0beta-3: "changelog/v1.0.0beta-3.md"
       - v1.0.0beta-2: "changelog/v1.0.0beta-2.md"