Merge local and global installation steps

[Ranjit1312]

Fixes #7160

Short description of what this resolves:

Merge local and global installation steps in basic.md.

Changes proposed in this pull request:

• Removed local.md
• Updated Readme.md

Checklist

• I have read the Contribution & Best practices Guide and my PR follows them.
• My branch is up-to-date with the Upstream development branch.
• The unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

• All the functions created/modified in this PR contain relevant docstrings.

[iamareebjamal]

This step is repeated

[Ranjit1312]

Done

[codecov]

Codecov Report

Merging #7174 (a86db70) into development (b2f7a5d) will increase coverage by 0.51%.
The diff coverage is n/a.

❗ Current head a86db70 differs from pull request most recent head 090ceae. Consider uploading reports for the commit 090ceae to get more accurate results

@@               Coverage Diff               @@
##           development    #7174      +/-   ##
===============================================
+ Coverage        66.03%   66.55%   +0.51%     
===============================================
  Files              305      303       -2     
  Lines            15691    15499     -192     
===============================================
- Hits             10362    10315      -47     
+ Misses            5329     5184     -145     

Impacted Files	Coverage Δ
app/api/admin_sales/events.py	75.51% <0.00%> (-12.59%)	⬇️
app/api/schema/sessions.py	94.00% <0.00%> (-0.24%)	⬇️
app/models/session.py	92.78% <0.00%> (-0.08%)	⬇️
app/api/schema/events.py	98.63% <0.00%> (-0.01%)	⬇️
app/api/users.py	28.14% <0.00%> (ø)
app/models/custom_form.py	98.18% <0.00%> (ø)
app/api/helpers/system_mails.py	100.00% <0.00%> (ø)
session_slides_type_to_json.py
app/api/helpers/group_user_role.py
app/api/helpers/mail.py	33.17% <0.00%> (+0.31%)	⬆️
... and 10 more

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[Ranjit1312]

@iamareebjamal
I have made requested changes please review.

[hongquan]

@Ranjit1312 Please resolve conflict.