DOC-1047: Add Managing the Session ID section to Window Buffer Memory

[freakwriter]

Added the section (with small tweaks to make our linting tool happier) as outlined here.

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[github-actions[bot]]

Overall readability score: 44.17 (🟢 +0)

File	Readability
common-issues.md	50.92 (-)
index.md	10.55 (🔴 -2.99)

View detailed metrics

🟢 - Shows an increase in readability 🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
common-issues.md	50.92	52.39	11.41	12.9	11.78	9.18
	-	-	-	-	-	-
index.md	10.55	12.56	16.37	22	18.74	9.88
	🔴 -2.99	🟢 +5.51	🔴 -1.85	🟢 +0	🟢 +0.26	🔴 -0.34

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	44.17	35.32	11.46	14.71	14.26	8.47
	🟢 +0	🟢 +0.02	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less

[freakwriter]

@nik8n you'd put this one into Triage, can you review?

[nik8n]

@freakwriter the content looks good. Could we also put this into a separate page, like we did with telegram? Also, the part with completions etc, currently feels like it belongs to the managing the session ID section. Is that wanted?

[freakwriter]

@nik8n Ah the AI glossary--I'd added a title to that snippet but this branch hadn't been updated, so it should be more clear what that section is now.

I've split the common issues out to a separate page. Let me know if you want any other changes here.