ENH: raise TypeError if offsets which are not supported as period frequency pass to asfreq

[natmokval]

Pandas version checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

import pandas as pd

index = pd.PeriodIndex(["2020-01-01", "2021-01-01"], freq="M")
df = pd.DataFrame({"a": pd.Series([0, 1], index=index)})
print(df.index)
expected = df.asfreq(freq="2MS")

Issue Description

In this case we get
AttributeError: 'pandas._libs.tslibs.offsets.MonthBegin' object has no attribute '_period_dtype_code'

Expected Behavior

the expected message should be
TypeError: MS is not supported as period frequency

Installed Versions

Replace this line with the output of pd.show_versions()

[aram-cedarwood]

take

[dreamboxtech]

I can fix the issue. I would like to contribute.

[code-master-ajay]

can i take this ?

[natmokval]

@dreamboxtech, @code-master-ajay, another contributor is currently working on this issue

[sabari906]

hello everyone .. im new to open source contributing i have one doubt if one person take a one issue in github another person can take to wrork same issue? different people work in same repo if i solve the issue can i send a merge pull request?