docs(global): update markdown content + add _redirects file

Signed-off-by: Andrei Jiroh Halili <ajhalili2006@gmail.com>

markdown/user-manual/index.md

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+# Personal user Manual
+
+Hello there, and welcome to my personal user manual. This is where I document about myself for others in terms
+of communications and teamwork. While the contents of this mini wiki will be always a work in progress, I’ll expand
+them as I add missing information and update outdated details behind the scenes.
+
+## About me
+
+TBD
+
+## Contents
+
+Most of the links below will redirect you to 
+
+* [Communications](./communications.md)
+* [Personal and professional boundaries](./boundaries.md)
+* [Flaws and quirks](./flaws-and-quirks.md)
+* [Job Employment Availability](./job-employment-availability.md)
+* [Roleplaying Hellscape](./roleplaying-hellscape.md)
+
+## Other links
+
+* [Resume](./resume.md)
+* [Legalese and policies](https://coda.io/@ajhalili2006/readme/legalese-and-policies-5)

markdown/user-manual/resume.md

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+# My resume and portfolio
+
+This page contains the links to my resume and portfolio for future employers and those who are
+curious on what kind of work I'm doing in the past and present.
+
+## The basics
+
+* [Resume itself](https://go.recaptime.eu.org/crew/ajhalili2006/resume)
+* [Portfolio](https://go.recaptime.eu.org/crew/ajhalili2006/portfolio)