Support for Excel files

[Dev-Khant]

Description

Added support for excel files.

Fixes #1103

Type of change

• New feature (non-breaking change which adds functionality)
• Documentation update

How Has This Been Tested?

• Unit Test

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

Maintainer Checklist

• closes #xxxx (Replace xxxx with the GitHub issue number)
• Made sure Checks passed

[codecov]

Codecov Report

Attention: Patch coverage is 63.88889% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 55.85%. Comparing base (c181ccb) to head (f90c44a).
Report is 2 commits behind head on main.

❗ Current head f90c44a differs from pull request most recent head ca6254a. Consider uploading reports for the commit ca6254a to get more accurate results

Files	Patch %	Lines
embedchain/loaders/excel_file.py	40.90%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1319      +/-   ##
==========================================
+ Coverage   55.80%   55.85%   +0.04%     
==========================================
  Files         154      156       +2     
  Lines        6232     6268      +36     
==========================================
+ Hits         3478     3501      +23     
- Misses       2754     2767      +13     

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[Dev-Khant]

@deshraj Can you please review this?

[deshraj]

Going forward, we are planning to not add everything to the optional dependencies. Instead, can you please:

1. Add instructions in the docs to install these two packages
2. Try to import these on the loader file and if import fails, show the exception to install these packages.

[Dev-Khant]

@deshraj I have made the change, please check

[Dev-Khant]

@deshraj Tests are failing because of Qdrant vectordb

[Dev-Khant]

Hi @deshraj Can you please review it?

[Dev-Khant]

@deshraj @taranjeet Please can you review this?