feat: restructure docs into "chapters" (#12)

* feat(docker, k8s): create containers folder and kubernetes notes

docs/languages/python/modules/ftplib.md

@@ -0,0 +1,70 @@
+# Ftplib Module
+
+## FTP CLASSES
+
+```py
+ftplib.FTP(host="", user="", password="", acct="")
+# if HOST => connect(host)
+# if USER => login(user, password, acct)
+
+
+ftplib.FTP_TLS(host="", user="", password="", acct="")
+```
+
+## EXCEPTIONS
+
+```py
+ftplib.error_reply  # unexpected error from server
+ftplib.error_temp  # temporary error (response codes 400-499)
+ftplib.error_perm  # permanent error (response codes 500-599)
+ftplib.error_proto  # error not in ftp specs
+ftplib.all_errors  # tuple of all exceptions
+```
+
+## FTP OBJECTS
+
+```py
+# method on text files: -lines
+# method on binary files: -binary
+
+# CONNECTION
+FTP.connect(host="", port=0)  # used once per instance
+# DON'T CALL if host was supplied at instance creation
+
+FTP.getwelcome()  # return welcome message
+
+FTP.login(user='anonymous', password='', acct='')
+# called once per instance after connection is established
+# DEFAULT PASSWORD: anonymous@
+# DON'T CALL if host was supplied at instance creation
+FTP.sendcmd(cmd)  # send command string and return response
+FTP.voidcmd(cmd)  # send command string and return nothing if successful
+# FILE TRANSFER
+FTP.abort()  # abort in progress file transfer (can fail)
+
+FTTP.transfercmd(cmd, rest=None)  # returns socket for connection
+# CMD active mode: send EPRT or PORT command and CMD and accept connection
+# CMD passive mode: send EPSV or PASV and start transfer command
+
+FTP.retrbinary(cmd, callback, blocksize=8192, rest=None) # retrieve file in binary mode
+# CMD: appropriate RETR command ('RETR filename')
+# CALLBACK: func called on every block of data received
+
+FTP.rertlines(cmd, callback=None)
+# retrieve file or dir list in ASCII transfer mode
+# CMD: appropriate RETR, LSIT (list and info of files), NLST (list of file names)
+# DEFAULT CALLBACK: sys.stdout
+
+FTP.set_pasv(value)  # set passive mode if value is true, otherwise disable it
+# passive mode on by default
+
+FTP.storbinary(cmd, fp, blocksize=8192, callback=None, rest=None)  # store file in binary mode
+# CMD: appropriate STOR command ('STOR filename')
+# FP: {file object in binary mode} read until EOF in blocks of blocksize
+# CALLBACK: func called on each block after sending
+
+FTP.storlines(cmd, fp, callback=None)  # store file in ASCII transfer mode
+# CMD: appropriate STOR command ('STOR filename')
+# FP: {file object} read until EOF
+# CALLBACK: func called on each block after sending
+```