[JS] Update setup for samples

[lilyydu]

1. Add sample.env
2. Remove the AI-related vars from the local YMLs.
3. Remove yarn install and build in YMLs
4. Remove duplicate key names in logic
5. Fix references for MicrosoftAppId, MicrosoftAppPassword. Replace with BOT_ID, and BOT_PASSWORD in logic and YML - respectively. NOTE: might need to update how the adapter is created.
6. Update docs for set up instructions - just like how it's done in Math Bot & Chat Moderation.

No. 6 examples:

• Incorrect descriptions
• Missing table of contents
• Typos

No. 6 example bot PR: https://github.com/microsoft/teams-ai/pull/969/files#diff-155c7061e7d0a0889267fc8c01cc0dc96ccb57b99ebdf5e651b69f345134a12f

Idea: match WhoBot flow with population of variables.

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1. [JS] MathBot - Update setup #967
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2. [JS] ChatModeration - Update setup #968
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3. [JS] 01.messaging.a.echoBot - Update setup #970
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4. [JS] 02.messageExtensions.a.searchCommand - Update setup #971
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5. [JS] 03.adaptiveCards.a.typeAheadBot - Update setup #972
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6. [JS] 04.ai.b.messageExtensions.AI-ME - Update setup #974
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7. [JS] 07.whoBot - Update setup #985
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8. [JS] 04.ai.d.chainedActions.listBot- Update setup #977
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9. [JS] 04.ai.e.chainedActions.devOpsBot - Update setup #976
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10. [JS] 04.e.twentyQuestions - Update setup #978
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11. [JS] 06.assistants.b.orderBot - Update setup #979
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12. [JS] 06.auth.oauth.adaptiveCard - Update setup #980
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13. [JS] 06.auth.oauth.bot - Update setup #981
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14. [JS] 06.auth.oauth.messageExtension - Update setup #982
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15. [JS] 06.auth.teamsSSO.bot - Update setup #983
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16. [JS] 06.auth.teamsSSO.messageExtension - Update setup #984
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17. [JS] 04.ai.c.actionMapping.lightBot - Update setup #1015
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