Update precommit and fix linter

[Skylion007]

Motivation and Context

• Fixes the isort linter issues since the newer version of isort has slightly different standards.
• Also added some new precommit hooks to help keep the repo clean.

Checklist

• My code follows the code style of this project.
• [] My change requires a change to the documentation.
• [] I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have completed my CLA (see CONTRIBUTING)
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #433 into master will decrease coverage by 0.00%.
The diff coverage is 86.20%.

@@            Coverage Diff             @@
##           master     #433      +/-   ##
==========================================
- Coverage   76.32%   76.31%   -0.01%     
==========================================
  Files         108      108              
  Lines        7665     7664       -1     
==========================================
- Hits         5850     5849       -1     
  Misses       1815     1815              

Impacted Files	Coverage Δ
habitat/core/benchmark.py	47.94% <0.00%> (ø)
habitat_baselines/agents/slam_agents.py	0.00% <0.00%> (ø)
habitat/core/utils.py	52.00% <100.00%> (ø)
habitat/core/vector_env.py	80.00% <100.00%> (ø)
habitat/sims/habitat_simulator/__init__.py	56.25% <100.00%> (ø)
habitat_baselines/common/utils.py	79.10% <100.00%> (ø)
habitat_baselines/rl/ddppo/algo/ddp_utils.py	62.02% <100.00%> (ø)
habitat_baselines/rl/ddppo/algo/ddppo.py	67.50% <100.00%> (ø)
habitat_baselines/rl/ddppo/algo/ddppo_trainer.py	78.57% <100.00%> (ø)
habitat_baselines/rl/ddppo/policy/resnet.py	68.90% <100.00%> (ø)
... and 11 more

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