Updates Mimic docs for 2.2 release (#421)

# Description

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Update Isaac Lab Mimic docs:

1. Add new section on training visuomotor policy for humanoid
2. Add clarifications on how to collect/annotate human demos for
humanoid
3. Add section on how to tune Mimic parameters
4. Minor command updates to bring in line with latest XR changes


## Type of change

- This change requires a documentation update

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## Checklist

- [x] I have run the [`pre-commit` checks](https://pre-commit.com/) with
`./isaaclab.sh --format`
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have updated the changelog and the corresponding version in the
extension's `config/extension.toml` file
- [ ] I have added my name to the `CONTRIBUTORS.md` or my name already
exists there

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---------
Signed-off-by: rwiltz <165190220+rwiltz@users.noreply.github.com>
Signed-off-by: Kelly Guo <kellyguo123@hotmail.com>
Signed-off-by: Ashwin Varghese Kuruttukulam <123109010+ashwinvkNV@users.noreply.github.com>
Signed-off-by: Kelly Guo <kellyg@nvidia.com>
Signed-off-by: Michael Gussert <michael@gussert.com>
Co-authored-by: lotusl-code <lotusl@nvidia.com>
Co-authored-by: Kelly Guo <kellyg@nvidia.com>
Co-authored-by: jaczhangnv <jaczhang@nvidia.com>
Co-authored-by: rwiltz <165190220+rwiltz@users.noreply.github.com>
Co-authored-by: Yanzi Zhu <yanziz@nvidia.com>
Co-authored-by: nv-mhaselton <mhaselton@nvidia.com>
Co-authored-by: cosmith-nvidia <141183495+cosmith-nvidia@users.noreply.github.com>
Co-authored-by: Michael Gussert <michael@gussert.com>
Co-authored-by: CY Chen <cyc@nvidia.com>
Co-authored-by: oahmednv <oahmed@Nvidia.com>
Co-authored-by: Ashwin Varghese Kuruttukulam <123109010+ashwinvkNV@users.noreply.github.com>
Co-authored-by: Rafael Wiltz <rwiltz@nvidia.com>
Co-authored-by: matthewtrepte <mtrepte@nvidia.com>
Co-authored-by: chengronglai <chengrongl@nvidia.com>
Co-authored-by: pulkitg01 <pulkitg@nvidia.com>
Co-authored-by: Connor Smith <cosmith@nvidia.com>
Co-authored-by: Ashwin Varghese Kuruttukulam <ashwinvk@nvidia.com>
Co-authored-by: Kelly Guo <kellyguo123@hotmail.com>

docs/source/how-to/cloudxr_teleoperation.rst

@@ -152,7 +152,7 @@ There are two options to run the CloudXR Runtime Docker container:
 
          ./isaaclab.sh -p scripts/environments/teleoperation/teleop_se3_agent.py \
              --task Isaac-PickPlace-GR1T2-Abs-v0 \
-             --teleop_device dualhandtracking_abs \
+             --teleop_device handtracking \
              --enable_pinocchio
 
    #. You'll want to leave the container running for the next steps. But once you are finished, you can
@@ -217,7 +217,7 @@ There are two options to run the CloudXR Runtime Docker container:
 
          ./isaaclab.sh -p scripts/environments/teleoperation/teleop_se3_agent.py \
              --task Isaac-PickPlace-GR1T2-Abs-v0 \
-             --teleop_device dualhandtracking_abs \
+             --teleop_device handtracking \
              --enable_pinocchio
 
 With Isaac Lab and the CloudXR Runtime running:
@@ -291,7 +291,7 @@ On your Isaac Lab workstation:
 
       ./isaaclab.sh -p scripts/environments/teleoperation/teleop_se3_agent.py \
           --task Isaac-PickPlace-GR1T2-Abs-v0 \
-          --teleop_device dualhandtracking_abs \
+          --teleop_device handtracking \
           --enable_pinocchio
 
    .. note::